ClickHouse/docs/changelogs/v23.3.8.21-lts.md

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---
sidebar_position: 1
sidebar_label: 2023
---
# 2023 Changelog
### ClickHouse release v23.3.8.21-lts (1675f2264f3) FIXME as compared to v23.3.7.5-lts (bc683c11c92)
#### Bug Fix (user-visible misbehavior in an official stable release)
* Fix backward compatibility for IP types hashing in aggregate functions [#50551](https://github.com/ClickHouse/ClickHouse/pull/50551) ([Yakov Olkhovskiy](https://github.com/yakov-olkhovskiy)).
* Fix segfault in MathUnary [#51499](https://github.com/ClickHouse/ClickHouse/pull/51499) ([Ilya Yatsishin](https://github.com/qoega)).
* Fix for moving 'IN' conditions to PREWHERE [#51610](https://github.com/ClickHouse/ClickHouse/pull/51610) ([Alexander Gololobov](https://github.com/davenger)).
* Fix reading from empty column in `parseSipHashKey` [#51804](https://github.com/ClickHouse/ClickHouse/pull/51804) ([Nikita Taranov](https://github.com/nickitat)).
* Check refcount in `RemoveManyObjectStorageOperation::finalize` instead of `execute` [#51954](https://github.com/ClickHouse/ClickHouse/pull/51954) ([vdimir](https://github.com/vdimir)).
* Allow parametric UDFs [#51964](https://github.com/ClickHouse/ClickHouse/pull/51964) ([Alexey Milovidov](https://github.com/alexey-milovidov)).
#### NOT FOR CHANGELOG / INSIGNIFICANT
* Decoupled commits from [#51180](https://github.com/ClickHouse/ClickHouse/issues/51180) for backports [#51561](https://github.com/ClickHouse/ClickHouse/pull/51561) ([Mikhail f. Shiryaev](https://github.com/Felixoid)).
* Fix MergeTreeMarksLoader segfaulting if marks file is longer than expected [#51636](https://github.com/ClickHouse/ClickHouse/pull/51636) ([Michael Kolupaev](https://github.com/al13n321)).